You can do that. And some of them might say yes to it, but honestly I consider that a little rude. Why would get marriage prep from a priest and not have him do the wedding?
That's what I thought too. That's why I only contacted the bishop. But I don't know if H.E. does matrimony at all, or if he will respond to me. That's why I asked here on the forum. Maybe somebody who knows H.E. could answer?